List of outside-underwear superheroes.
OK. A common beef for fans - more common that capes, I would say - is those comic characters whose outfits look like they are wearing their underwear on the outside, swimtrunks, whatever.
It's anyone whose close-pant area, is a different colour than the leggings of their costume.
Immediate characters come to mind - Superman, Batman, Orion.
Who are the rest? Can we name them all? And can we get pictures? 😄